Ajoutez des fichiers projet.

Beverages/Beverages.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+</Project>

Beverages/IBeverage.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Beverages
+{
+	interface IBeverage
+	{
+	}
+}

Beverages/IPhysicalProperties.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Beverages
+{
+	interface IPhysicalProperties
+	{
+	}
+}

Beverages/ISweetener.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Beverages
+{
+	interface ISweetener
+	{
+	}
+}

Exercice2.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.2.32526.322
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Exercice2", ".\Exercice2\Exercice2.csproj", "{97DF561A-2E22-4CB0-9EF1-FC3224AE6DB3}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Beverages", ".\Beverages\Beverages.csproj", "{06F28125-D0AD-41EF-BE32-6EAA6622C0EF}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{97DF561A-2E22-4CB0-9EF1-FC3224AE6DB3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{97DF561A-2E22-4CB0-9EF1-FC3224AE6DB3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{97DF561A-2E22-4CB0-9EF1-FC3224AE6DB3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{97DF561A-2E22-4CB0-9EF1-FC3224AE6DB3}.Release|Any CPU.Build.0 = Release|Any CPU
+		{06F28125-D0AD-41EF-BE32-6EAA6622C0EF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{06F28125-D0AD-41EF-BE32-6EAA6622C0EF}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{06F28125-D0AD-41EF-BE32-6EAA6622C0EF}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{06F28125-D0AD-41EF-BE32-6EAA6622C0EF}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {5AEF1449-FFB0-483B-916A-EDB36B12793E}
+	EndGlobalSection
+EndGlobal

Exercice2/Exercice2.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Beverages\Beverages.csproj" />
+  </ItemGroup>
+
+</Project>

Exercice2/Program.cs

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+using System;
+using Beverages;
+using System.Diagnostics;
+
+namespace Exercice2
+{
+	internal class Program
+	{
+		static void Main(string[] args)
+		{
+			IBeverage tea = new Tea(TeaType.Oolong);
+			Debug.Assert(tea.GetTemperature() > (float)95, "Tea temperature needs be above 95C");
+
+			ISweetener sugar = new Erythriol(0.5);
+			tea.Sweeten(sugar);
+			Debug.Assert(tea.GetSweetenersList().Count == 1, "We put a single sweetener type");
+
+			IBeverage coffee = new Coffee(CoffeeType.ColdBrew);
+			Debug.Assert(coffee.GetTemperature() < (float)5, "Coldbrew coffee temperature needs be below 5C");
+
+			IBeverage horror = new Mix(tea, coffee);
+			Debug.Assert(horror.GetTemperature() < (float)55, "Horror temperature needs be average of tea and coffee");
+			Debug.Assert(horror.GetSweetenersList().Count == 1, "We put a single sweetener type");
+
+			ISweetener coffeeSugar = new Erythriol(0.5);
+			coffee.Sweeten(coffeeSugar);
+			Debug.Assert(horror.GetSweetenersList().Count == 1, "We put a single sweetener type, just more of it");
+		}
+	}
+}